Mucosal Immunity to Asymptomatic Entamoeba histolytica and Entamoeba dispar Infection Is Associated with a Peak Intestinal Anti-Lectin Immunoglobulin A Antibody Response.

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dc.contributor.author ABD-ALLA, MD en
dc.contributor.author Jackson, TFHG en
dc.contributor.author Rogers, T en
dc.contributor.author Reddy, Selvan en
dc.contributor.author Ravdin, JI en
dc.date.accessioned 2012-03-13T23:21:06Z en
dc.date.issued 2006 en
dc.identifier.citation Infection and Immunity 74(7):3897-3903 2006 en
dc.identifier.issn 0019-9567 en
dc.identifier.uri http://hdl.handle.net/2292/14261 en
dc.description.abstract We monitored 93 subjects cured of amebic liver abscess (ALA) and 963 close associate controls in Durban, South Africa, and determined by enzyme-linked immunosorbent assay that the intestinal immunoglobulin A (IgA) antibody response to the Entamoeba histolytica galactose-inhibitable adherence lectin is most accurately represented by a complex pattern of transitory peaks. One or more intestinal anti-lectin IgA antibody peaks occurred in 85.9% of ALA subjects over 36 months compared to 41.6% of controls (P < 0.0001). ALA subjects exhibited a greater number of anti-lectin IgA antibody peaks (P < 0.0001) than controls. In addition, their peak optical density values were higher (peak numbers 1 to 3, P < 0.003), peaks were of longer duration (for peaks 1 and 2, P ≤ 0.0054), and there was a shorter time interval between peaks (between 1 and 2 or 2 and 3, P ≤ 0.0106) than observed for control subjects. A prior E. histolytica infection was associated with the occurrence of an anti-lectin IgA antibody peak (79.1%, P < 0.0001) more so than for Entamoeba dispar infection (57.2%, P < 0.001). The annual number of anti-lectin IgA antibody peaks in ALA subjects was 0.71 per year, compared to just 0.22 in controls (P<0.0001), indicating a higher rate of exposure to the parasite than previously appreciated. Anti-lectin IgA antibody peaks were of higher amplitude following a E. histolytica infection compared to E. dispar (P = 0.01) and, for either, were of greater height in ALA subjects than controls (P < 0.01). ALA subjects demonstrated greater clearance of amebic infection after an anti-lectin IgA antibody peak compared to controls, and only 14.3% remained with a positive culture after the peak, compared to 38.9% in controls (P = 0.035). In summary, this prospective controlled longitudinal study elucidated the dynamic nature of the human intestinal IgA antibody response to E. histolytica and E. dispar infection and revealed that ALA subjects exhibit heightened intestinal anti-lectin IgA antibody peaks that are associated with clearance of E. histolytica and E. dispar infection. en
dc.publisher American Society for Microbiology en
dc.relation.ispartofseries Infection and Immunity en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0019-9567/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Mucosal Immunity to Asymptomatic Entamoeba histolytica and Entamoeba dispar Infection Is Associated with a Peak Intestinal Anti-Lectin Immunoglobulin A Antibody Response. en
dc.type Journal Article en
dc.identifier.doi 10.1128/​IAI.02018-05 en
pubs.issue 7 en
pubs.begin-page 3897 en
pubs.volume 74 en
dc.rights.holder Copyright: American Society for Microbiology en
pubs.end-page 3903 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 247935 en
pubs.record-created-at-source-date 2011-11-30 en


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